Folding saw



FIG. 1 is a left side elevational view of a folding saw with the blade extended showing my new design;

FIG. 2 is a side elevational view taken from the right side thereof with the blade retracted;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a top plan view thereof; and

FIG. 6 is a bottom plan view thereof. 

The ornamental design for a folding saw, as shown and described. 